Special louver-type ventilator for ship portholes



Feb. 26, 1946 A. P.. HSCHER ET AL SPECIAL LOU VER IYPE VENTILATOR FOR SHIP PORTHOLES 1944 2 Sheets-Sheet 1 Filed Feb. 11

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Feb. 26, 1946. A. P. FISCHER ETAL 2,395,619

SPECIAL LOUVER-TYPE VENTILATOR FOR SHIP PORTHOLES I Filed Feb. 11, 1944 2 Sheets-Sheet? Inventor device Patented F eb. 26, 1946 OFFICE SPECIAL LOUVER-TYPE VENTILATOR FOR SHIP PORTHOLES Andrew Paul Fischer and Hazel Fischer, San Francisco, Calif.

Application February 11, 1944, Serial No. 521,986

2 Claims.

This invention relates to an especially designed louver type ventilator for disposition. in a porthole of a ship, and the outstanding purpose of said ventilator is to function as a blackout closure while at the same time promoting requisite air circulation for -cabin ventilating use.

In reducing the preferred embodiment of the invention to actual practice I have conceived of a structural arrangement of carefuly chosen and inter-related coacting elements thus providing a susceptible of quantity production on a mass basis, whereby to provide an ideal type ventilator fulfilling the requirements of both the manufacturer, the trade, and users.

More specifically, I have evolved for practical and expedient use a ventilator characterized by a special adaptation and arrangement of louvers to thus provide a light-proof unit readily insertable and removable and susceptible of bodily adjustment in an orbital path to position the louvers in varying angular position to serve either as socalled air scoops, or as rearwardly facing suction vanes.

Other features and advantages of the invention will become more readily apparent from the following description and the accompanying illustrative drawings.

In the drawings, wherein like numerals are employed to designate like parts throughout the views:

Figure 1 is a fragmentary inside elevational view of a special louver-type blackout ventilator constructed in accordance with the preferred principles of the instant invention.

Figure 2 is a fragmentary elevational view of one-half of the structure observing the side opposite to that seen in Figure 1, this to bring out the position of the crank controlled positioning and retaining lug.

Figure 3 is an enlarged detailing and fragmentary sectional view, this on the line 3--3 of Figure 1 looking in the direction of the arrows.

Figure 4 is a fragmentary peripheral or edge elevational view showing both sides of the device and the crank and lug retaining means.

Figure 5 is a fragmentary sectional view showing a modified form of the invention.

The ventilator, as a unit. is denoted by the numeral 6. It is shaped and proportioned to slip into the portholes 1 of the hull of the ship as brought out to advantage in Figure 3. It is constructed of sheet metal or equivalent sheet material to render it sufficiently strong and durable. The main frame 8 is of annular form and (see Figure 3) is provided inwardly of one edge with a marginal or circumferential V-shaped channel defining an assembling shoulder or bead 9 for the outside disk-plate Hi. This plate fits tightly within the frame 8 and abuts the bead 9 and may be soldered or otherwise secured The plate is provided with horizontal parallel slots I l constituting the exterior ventilating openings. Coacting with each slot is a hood-like louver I 2. The lower free edge portion of the louver is disposed on a plane approximately even with the bottom of the coactingslot ll. Also the interior louvers M are positioned opposite the slots I I, each louver element having an attaching flange l5. This particular louver is deeper than the complemental outside louver and, therefore, has its lower edge portion extending considerably below the edge of the slot. This provides for free circulation of air and at the same time forms a substantially light-proof ventilation arrangement. It will be noticed also in Figure 3 that the intermediate portion of the annular shell or frame is provided with struck-out drainage or seepage cups 8a. The inboard marginal edge of the frame is provided with a radially outstanding flange l6, this to coact with the embracing hooked marginal flange l I carried by the inside disk plate I8. This plate l8 like the plate Ill is provided with horizontally elongated slots [9 for ventilating and over each slot and on the right thereof is a scoop or hood-like louver 20. Further, inthis arrangement I provide internal louvers 2| having attaching flanges soldered or otherwise secured in place on the inner surface of said plate. These louvers 2| correspond to the coacting or opposed louvers l4. They are of a depth or cross-sectional dimension to well cover the coacting ventilating slots l9. The interlocking-marginal arrangement provided by the two flanges l6 and I1 provides satisfactory ways and means of holding the entire structure nicely in place, that is, in place against the surrounding gasket or packing ring 23.

At diametrically opposite points I provide rotatably mounted shafts 24 each having a hand crank 25 at its inner end and a wedging-type lug or retaining detent 26 at the inner end. These lugs engage the marginal portion of the porthole frame to thus securely mount the device in operative position.

In some instances it is possible to use a wooden frame-work such as is shown for example, in Figure 5 at 21. In this instance, the two louverequipped plates or disks 28 and 29 are arranged in parallelism and secured by nails or equivalent fasteners 30 to the surrounding frame-work. The louvers and slots are the same as already de- 2 scribed and are, therefore, denoted by the same reference numerals.

It is within the sphere or scope of the invention to vary the configuration from circular to rectangular or some other form and to use the structure in building wall openings such as for example, photographic laboratories or any place requiring ventilation without admitting daylight. It is also to be pointed out that the in corporation of a screen is optional, though the same is desirable in tropical zones and locations and may be mounted in the frame between the louver l4 and 2|. The compact construction and arrangement is such as to permit a porthole to be closed by the usual glass cover (not shown) without necessitating removal of the device from the porthole. g

The structure ma be rotated any direction, with the opening of the fins or louvers turned in the direction in which the ship is proceeding, theyto'act as air scoops. Or the structure may be turned in an opposite position at which time the louvers act as air exhausts. By facing the louver arrangement up or down the emc't "on air circulation is virtually nil.

The entire arrangement, with the exception of the fasten-lugs and insect screen constructed of light metal, but 'due to its construction is quite rigid. The ins'des or the louvers or vanes are painted dark, that is, jet black to prevent any reflection of light rays. It is evident, -theretore, that the structure aptly fulfills the requirement of a device in this category and fulfills a long ielt need for proper ship accessories in blackout areas, paiticuiarly in tropical zones.

It is thought that persons skilled in the art to which the invention relates will be able to obtain a clear understanding ot the invention after considering the description .n connection with the drawings. Theretore, a more :len'gthy description is regarded as unnecessary.

Minor changes in the shape, size and arrangement 'of details coming within the field of invention claimed may be resorted to in actual practice, if "desired.

Having described theiriven-tion, what is=c1aizned as new is:

1. A blackout comprising a substantially annular frame, the inboard end of said frame having an outstanding endless circumferential flange, a disk-like interior closing plate having a marginal flange interlocking with the first-named flange, said diskiike plate having a plurality of horizontal slots, integral louvers on the outer side of said plate registeringwi'th the slots, said louvers having the lower edges thereof terminating substantially even in a plane with the lower edges of the slots, internal louvers considerably greater in depth than the first-named louvers and having flanges attached to the interior surface of the plate, the last mentioned louvers depending below the lower edges of said 'slot's, a corresponding type slot and louver-equipped plate closing the outboard end portion "of said frame, and the intermediate portion of the frame being provided with circumferentially spaced drainage holes.

2. A ventilator .forportholes and the comprising a tubular frame open at inner and outer ends and being of a diameter adapting it to be thrust into a porthole through the inner end thereof and provided at its inner end with outstanding abutment means for engaging margins of the porthole and limiting outward movement of the frame through the :po-rthole, inner and outer endlplates carried by said frame, each end plate being formed with a plurality of transverse slots constituting air passages spaced from each other, one above another, louvers carried by said plates and projecting outwardly therefrom along upper edges and ends of said slots and havin their lower edges substantially flush with the planes of lower edges of the slots, and other louvers carried by said plates and projecting from inner faces of the plates along upper edges and ends of the slots and being of appreciably greater depth than the slots and the first-mentioned louvers and projecting downward below lower edges of the slots an appreciable distance.

PAUL FISCHER. HAZEL FISCHER.

type ship porthole ventilator 

